A Liberal National Party senator is on the receiving end of a social media backlash after he took to Facebook to share a photo of a dead cockatoo caught in the roof rack of his car.

James McGrath's post is accompanied by the caption "Car 1. Flock of cockatoos 0."

The image has attracted widespread criticism with many users accusing the senator of boasting about the bird's death.

"This photo really proves a lack of compassion and respect for our precious, unique wildlife. You’ve definitely lost my vote Senator," one viewer writes.